Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3e05c6f97cfa9b…

MALICIOUS

PDF

44.5 KB Created: 2020-11-07 20:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 7732c59b1843884e547c3858022a02e9 SHA-1: 24aaa5484e5b5989672d7e24fc861f5bf4de5cad SHA-256: fb3e05c6f97cfa9ba8055b972113dac8d654de4910e9c722998d12254a8d4fcd
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffi.ru/aws?keyword=the+irishman+parent+guide PDF link annotation
    • https://difiraboveju.weebly.com/uploads/1/3/4/5/134508976/rimawa_dujejosalen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387232/normal_5f9c558aaa941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87ff749831b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f978eb6c72ed.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/8794426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f8b393e37977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5fa40d7a28654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/nowunevi.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/buy_here_pay_here_in_wilmington_delaware.pdfIn PDF document text
    • https://luvigorabu.files.wordpress.com/2020/11/51622911512.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/chs_entrance_exam_paper_for_class_11.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1D 5292 bytes
SHA-256: 35cb88caa35e24da2cb16743fa575aecb0e69914ee79c07297cb4d6e6b78b540
font_01_sfnt_off000080ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80ED 10712 bytes
SHA-256: 718e604cba633a4bc135a30ee2cba798c4b6d7f461cb67eb218d40477d508405